Two-weave loom dobby



i April 29, 1930. A A GQRDON v1,756,590

Two-wEAvE Loom DoBBY Filed Dec. 1, 1927 4 Sheets-Sheet l April 29, 1930. A. A.5 GORDON TWO-WEAVE LOOM DOBBY Filed Dec. l, 1927 4 Sheets-Sheet 2 vWm.

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MN &N MN wk MN April 29, 1930. A. A'. GORDON 1,756,590v

v TWO-WEAVE LOOM DOBBY I Filed Dec. 1, 1927 4 sheets-sheet "4 Patented Apr. 29, 1930 UNITED ,STATES PATENT rFrE ALBERT A. GQRDQN, y]? WORCESTER, 'MASSACHUSETTS ASSIGNOR llO CROMPTON &

KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION MASSACHUSETTS T W'O-IN'EA'VE LOOM DOBBY Application filed December 1,1527. Serial No. 237,071.

This invention relates yto multiple weave pattern mechanisms for looms and rit vis the general object of the invention toprovide a main pattern surface which may be varied to meet different conditions to produce a variety of fancy weaves Atogggether with an auxiliary pattern surface which may, if desired, remain the same for all different forms of the main pattern surface, the auxiliary surface providinga simpler formof weave to-` appear in those portions ofthe fabric lying between the fancy patterns zwhichare woven by the main pattern chain.A

In my priorPatent blo-1,060,977 there is shown a so-called name dobby which has gone into general use Afor'weaving names, trade-marks or other identifying legends in the selvages of fabrics. The dobby shown iii that patent provides no means for incorporating the name formingwarps intotlie cloth between the names and `these warps remain as floats which must be cut olf before the fabric lis ready for the market.

In my co-pending application Ser. No. 203,417 there is shown an improved formof name dobby wherein provision is made for attaching the name forming warp threads to the cloth at spaced intervals in the sections between the names, thus avoidinggthe necessity forshearing after the cloth Ais `removed from the loom. The auxiliary pattern surface shown in said application controls but one set of hooks so that it cannot be-used to provide asecond weave. The auxiliary-pattern surface 'shown in said application also moves about a fixed axis and for this reason there must alwaysbe a blank space running the length of the auxiliary surface which is presented to the hook controlling `members' when the main pattern chain is active. Itis found that thisblank space limits the number of waysinwhicli the selected warp threads can be attached'to theselvage. y

It is an important object of my present in- '3 veiition to yprovide means Avfor moving the auxiliary surface so that when out of action it will be raised above the liookcontrolling members, thereby rendering unnecessary the blank space required in thevaforesaid application. By operating on each setof,hooks I am able to `control the warp threads for every pick of the loom and thus produce perfect weaves. Because ofthe fact that-the upper cylinder in yits present form .-is moved out-of the range of the liook controlling members it is not necessary that the multiplying intervals in picks between names be a multiple of the picks required for the revolution ofthe auxiliary pattern surface, although suchV aref lation is necessary in the device shown in the aforesaid application.

It is another object of my present inven-v tion to provide a simplifiedmeans for guiding the dobby fingers. Asordinarily made the outer ends of dobby fingers are reduced to cooperate with al comb which guidesthe fingers and holds them in position for proper registry with the pegs on thedobby .'cliain. I findV that pressed steel fingers are sol uniform that it is unnecessary to guide every individ ual linger, it being suiicient to make certain of tlie fingers shorter than the others to provide a space for a guide pin, one guidepin serving to properly locate several fingers. c

Y It is a more detailedobj ect ofrlmy invention to make the cylinder 011 Whichv the multiply-- ing chains are located of laminations so that if A*desired the length of the cylindermayjbe increased to provide roomforanother niultiplying chain. l y

Dobbies usually employ lifter wires which extend from certain of the fingers to the upper hooks to posit-ion the latter with respect to the uppertinife. my presentinvention to'eirtend these wires so that they niay have direct Contact with the previously -iiieiitioned'auxiliary ,pattern suring hook.

has no connection with the main pattern surface which determines theweave ofthe gfabric 't iS ,a further object of 1 85 lhe dobby as set forth .herein designedl'k l primarily `for controlling selvage threadsand between selvages and it is a stillgfurtlier ob-y f ject of my inventionto provide a loom having A a main warp controlling mechanism suoli as a dobbyv in combination with asmaller addi-j tional =pattein-1nechanisni which itself is capable of providing a plurality of different i weaves'independent of the weaves provided by the main warp controlling device.

Vit-h these and other objects in view which y will appear as the description proceeds, my

invention resides in the.combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein I have shown a convenient embodiment of my invention Fig. 1 is a side elevation of a dobby` made according to my. present invention with the main pattern chain operative Vand theaux iliary pattern mechanism moved to inactive rection of arrow 5, Fig. 4, certain parts being in section;

Figs. 6 and 7 tions on lines 6 6 and 7 7, respectively, Fig. Y

Fig. 8 is an enlarged longitudinalsection through a portion of the auxiliary pattern surface taken on line 8 8 of Figli..

Fig. 9 is an enlarged end elevation looking are detailed horizontal seca l in the direction of arrow 9, Fig. 2;

Fig. 10 is a vertical section on line 10 10 of Fig. 9;

' Fig. 11 is an enlarged horizontal section on' line 11 11 of Fig. 2;

Fig. 12 is a plan of'one of the Vdisks of which the auxiliary pattern surface is formed;

Fig. 13 is a diagrammatic front elevation of aT loom showingthe main dobby which con-V i? trols the Ygreater part of the .warp threads and also the dobby forming the subject matter of the present invention, and

fFig. 14 is a lfragmentary sectional view i 'taken on line 14 14 of Fig. 1 showing'the lock levers which lock the main patterns cylinder and multiplier chain.

Referring to Fig. 13 I have shown Vthe relativel positions of'certain parts of the loom with respect to my present invention. As

i shown therein the loom frame L supports the main warp controlling device which may be a dobby D to control the harness frames H. The cords C lift the selvage warps to be controlled by my improved mechanism` shown i generally G,although it is to be understood that the mechanism set forth herein can be.

employed to weave figures at points in the fabric intermediate the selvages.

videda dobby frame 10 supported preferably by the arch 11 of the loom and having mounted for rotation therein a dobby cylinder 12. Said cylinder may be provided with a pattern chain 13 preferably ofthe so-called double index type and have secured thereto a shaft 14 which extends thro-ugh one of its bearings to have secured thereto a ratchet wheel 15. A pawl 16 is mounted on a stud 17 Vcarried by an armv 18 secured to 'rock shaft 19. Said shaft 19 is given an oscillating movement by means of a connector 20 through the action of a cam or other suitable device not shown but operating so as to rock the shaft 19 in one directionon one pick and in the opposite direction on the next pick. In this way the pawl 16 is given an-upward movement every alternate pick of the loom. Y

The mechanism for determining when the pawl 16 shall be operative to engage the ratchet 15 includes a multiplying unit-.M having a cylinder 21 rotatable on the shaft 14.V Said cylinder carries a. pair of multiplying chains 22 and 23, respectively, ofdifferent lengths, each of which is formed of a num-Y ber of high links 24 and one low link 25. A

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lever 26 pivoted on a fixed stud 27 has a foot 28 broad enough toen'gage both of theV chains. Said lever has at the upper end thereof a controller k29 which is adapted to cooperate with a broadened portion 30 ofthe pawl 16. So long as a high link on one or both of the multiplying chains is under the foot 28 the lever 26 will. be held in the position shown in Fig. 1 with the controller 29 holding the pawl 16 outwardly to be inactive with respect to the ratchet 15, but when both ofthe low links appear under Vthe foot the latter will move tothe right as shown in Fig. 1 and the pawl 16 will move inwardlyto have engage'- ment with the ratchet wheel 15.

Theharness cord controlling jacks 31 are each pivoted to a carrier lever 32having pivotal connection with a xed pin 33. Each carrier-lever is pivoted to a back lever 34 at an intermediate portion of the latter, and each backv lever is provided with a pair of hooks, vone at each end, the upper hooks be ing indicated at 35 and the lower hooks in- .dicated at 36. A rocking frame 37 secured to the shaft 19 has upper and lower knives.V

38 and 39, respectively, which act to `move any hooks which may be in their paths as they rock back and forth.

' The means for determining which of the hooks shall be engaged by the knives includes a set of lingers 40 pivoted on theY stud 27. Certain of said iingers have upwardly and forwardly extending arms 41 for direct engagement withV the lower hooks 36 while other of said ngers have normally horizontal arms 42 which cooperate with'lifter rods 43 to raise and lower the upper set of hooks.

The multiplying cylinder has rigid theret with a ratchet 44 positioned to be actuated by the vertically reciprocating p'awl 45 pivoted on the pin 17. By means of a weighted portion 46 the pawl 45 is held against a stop 47 on a control lever 48 having shoe 49 to be acted upon by clip 50 carried by one Vof the links of the main pattern chain 13.

In the operation of the mechanism thus far described the pawl 16 will engage the ratchetV 15 to produce an advance movement of the main chain 13 on each alternate pick of the loom. r1`he pegs on the bars of said chain will raise selected fingers so that the corresponding hooks will be lowered and as the rocking frame 37 oscillates the lowered hooks will be moved to the right as viewed in Fig. 1, the upper hooks being moved on one pick and the lower hooks on the next pick, one angular movement of the dobby cylinder 12 determining the shedding for two successive picks of the loom. During this operation the lever 48 is in the down position shown in Fig. 1 with the stop 47 holding the pawl 45 out of engagement with the ratchet 44, but as the main chain continues to rotate to produce a fancy pattern'the clip 50 will ultimately arrive under the shoe 49 to raise the lever 48 to the position shown in Fig. 3, whereupon the stop 47 will move to the right suiiiciently to permit engagement of pawl by ratchet 44. Clip 50 will effect the movements just 'described while pawl 16 is being raised on one pick and on the next succeeding pick pawl 45 will move downwardly to actuate the multiplier cylinder 21. The lever 26 which was previously positioned to permit pawl 16 to actuate the main cylinder will now be moved so that controller 29 will move to the right to disable the pawl 16, moving the same to the position shown in Fig. 1. @n each alternate pick thereafter the multiplying element will be given a vibration and the pawl 16 will beheld inactive until both low links again appear under the foot 28 of lever 26. During theoperation of the multiplier the main pattern surface is at rest, but as soon as the multiplier has completed its countingof the picks during which the main chain is i'dle the latter will again come int-o action and on its rst movement will'move downwardly to render the pawl 45 .inactive by reason of stop 47. The general construction thus far described together, with the method of operation, may be substantially the same as set forth in my aforesaid Patent No.' 1,060,977, to which reference may be had for a more extended explanation for the operation and uses of this portion of the device.

Mv present invention relates partly to the I"letails of construction ofthe mechanism a1- ready described. As shown in Figs. 1, 2 and 8 certain of the fingers 40v are shorter `than others and are indicated at 60. Spacing pegs 61 extend upwardly from a supporting bar n.0

on, said pegs being in alignment with the shorter fingers and having lateral supporting relation with respect to the longer fingers which lie on each side of the shorter lingers 60. As shown particularly in ig. 2 several of the full length fingers may be located between the pins 61. l find by this construction that the ngers are allproperly locate!v Ath respect to the pegs on the main pattern chain and that it is unnecessary to provide a guide peg for each linger as has been the usual construction heretofore. if desired the shorter fingers 60 may alternate withthe longer lingers so that there will be but two types of fingers, namely the short fingers, with the arms 42 and the longer fingers 40 with the arms 41.

A detailed feature of my invention relates to the construction of ratchet 15 and the multiplyingV mechanism M. As shown in Fig'. 11 the ratchet 15 maybe formed of a plurality of iiat disks 63 having toothed sections 64 together with other flat disk sections which have depressions 66 to cooperate with yielding lock lever 67v loosely pivoted on rod 27.

As shown in Fig. 10 the multiplying unit may have several disks V68 provided with de-l pressions 69 which cooperate with a yielding lock lever 70. A single spring 71 common to both the yielding lock levers 67 and 70 tends to hold the ratchet 15 and the multiplyin@ unit cylinder in proper position. Ratchet disks 72 similar to the disks 63 may form the multiplier ratchet 44. As shown in Fig. 3 other disks 73 having depressions 74 and projections 75 form the actuating cylinders for the chains22 and 28. Said disks 7 3 may be separated into two groups which are deiined by separating disks 76 all as shown in;

ing application illustrates an auxiliary pati l tern surface which is designed to control the hooks while the mainr dobby chain is at rest, but the construction set forth therein ias certain limitations-which are overcome by my present invention. As shown herein l provide an auxiliary pattern surfacewhich is to be raised out of controlling position when the main pattern surface is active but which is lowered so as to control the operation of the hooks when the main chain is at rest. Accordingly, 1 provide an auxiliary pattern surface designated generally at Artland i-nbe seen that a slot 87 in the shaft 80 receives a key 88 fitting into a notch 89 formed in one of the disks 83. ln this way the auxiliary snrface'formed of all the disks 83 ro- Y tates with the shaft 80.V

As shown in Fig. 2 an actuating element for the auxiliary surface is indicated at` 90, being secured to the shaft and having a ratchet 91 and a holding member 92 to cooperate with the yielding spring plunger 93 carried by one of the arms 81. An actuating pawl 94 for the auxiliary pattern surface is pivoted to the oscillating arm 18 at 95 preferably at a point between the shaft 19 and the pivot of the pawls 16 and 45. YThe reason for so locating the pivot of pawl 94 is that the auxiliary pattern surface as shown herein is designed to control 32 picks of the fabric being woven and must therefore be provided with sixteen angularly spaced controlling portions for the hooks. The ratchet 91 will. therefore have sixteen teeth whereas the ratchet for the multiplying element will have eight so that the pawl 94 will need only half as much motion as do the pawls 16 and 45.

ln order to determine when the auxiliary i' pattern surface shall be lowered and the pawl therefore rendered active I provide the lever V 48 with an extension 100 which by means of an adjustable link 101 isconnected to a rocking lever 102 pivoted loosely on the shaft i9. One arm of the lever 102 is pivotally connected as at 103 to a link 104 which extends upwardly to receive one end of the shaft 80 as shown in Figs. 1, r2, and 3. A second controller 105 is secured to the link 104 and is positioned for contact with pawl 94. The latter isv provided with a weighted arm 106 which normally holds Y the pawl against the second controller. spring 107 is interposedbetween the frame of the device and some part of the linkage between lever 48 and link 104, preferably at the connection between arm and link 101, said spring normally tending to hold the auxiliary cylinder in raised position.

The control devices for the hooks include the previously mentioned lifter rods 43 and H ends of said lifter rods are bent back on A tensionV themselves as at 112 to be received by short slots 113 formed in the upper guide 114.

The additional lifterrods 108 also extend through and are positioned by the guide109 and have the Yupper ends thereof bent downwardly as at 115, the downwardly bent end being spaced from the main part of the additional wire as shown clearly in Figs. 4 and 6, spaced holes 116 being formedin pairs in the top guide 114 toreceive each rod 108 and hold the same against angular displacement. rihe upper ends of both sets of rods are rounded as at 117 to cooperate with the projections 85 on the auxiliary pattern surface. rlhe lower end of each of the additional rods 108 has a horizontally extending portion y118 which is received by a notch 119 in the cor-v responding arm 41. enough so that the upper portion of the wire will not be engaged by the hook 36 which rests on the arm 41, thus preventing wearing of said wire.

lt is to be understood that there are as many hooks asthere are iingers,the lowerhooksbeing controlled by the fingers having the arms 41 by direct engagement of said lower hooks with said arms while the upper hooks are controlled through the lifter rods 43 by the fingers provided with thearms 42.

in the operation of the mechanism spring 107 will act to hold the auxiliary pattern Said notch is deep.

surface in raised position while the main Y dobby chain is weaving the name, trademark or other fancy weave to be incorporated into the selvage of the cloth, but as soon as clip 50 appears under shoe 49 the lever 48 will be raised, not only to startthe operation of the multiplier as previously described, `but also to move the auxiliary cylinder from the raised position shown in Fig. 1 to the low position show-n in Fig. 3. This movement is accom panied by a motion'of controller 105 to the left because of the fact that the link 104 also `moves to the left, the result of which is that the hooks controlled by said rods may vfall into the path of the knives 38 and 39.

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The disks may be located in any desired Y order to produce a variety of weaves and I do not wish to be limited to the formationv of the disks with a single projectionr85. As the multiplier co-mpletes its counting of picks during which the auxiliary surface is to be active the pawl 16 will againbecome active as previously describedv and the clip 50 will be moved from under the shoe 49 and spring 107 will raise the auxiliary pattern surface out of controlling position with respect to the lifter rods. The multiplier may hold the auxiliary pattern surface in actionfor any desired number of picks irrespective of the number of picks required for said auxiliary mechanism to completeits revolution because of the fact that the disks 83 are raised out of controlling position when the multiplier acts to restore control of the shedding to the main dobby chains. In this respect the device disclosed herein possesses an advantage over that shown in the aforesaid application although it is necessary in my present construction to have a blank bar on the main dobby chain under the fingers while the auxiliary pattern surface is in action.

From the foregoing it will be seen that I have provided a pattern mechanism for operating on selected warp threads wherein the auxiliary pattern surface is raised out of controlling position for the lifter rods so that the multiplying interval for themechanism M may be selected irrespective of the number of picks required for the auxiliary pattern surface to make a. complete revolution. Furthermore it will be seen that both sets of hooks are controlled so that the disks 83 may control every shed which is formed during t-he action of the auxiliary pattern. surface.

Again, it will be seen that the dobby lingers i are spaced by an improved arrangement wherein one guide pin suffices for several fingers. Also, the multiplying cylinder is made of laminations or disks as is also the ratchet wheel for the main chain. The upper ends of the lifter rods are arranged for direct engagement with the projections 85, the latter being of sufficient proportions to give the hooks a proper movement without the intervention of such multiplying levers as are shown in my aforesaid application. It will also be seen by reference to Fig. 13 that the mechanism herein Vprovides means for Weaving two distinctive types of weaves in addition to the ordinary pattern device D of the loom.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: Y

1. Ina pattern mechanism for looms, a main pattern surface movable about a fixed axis, a set of fingers to cooperate therewith, an auxiliary pattern surface, means separate from the lingers to establish connection between the auxiliary pattern surface and the fingers, means to render the main pattern surface alternately operative and inoperative, and meansto move and hold the auxiliary pattern surface out of controlling position with respect to the connections when the `main pattern surface is operative. l

2. In a pattern mechanism for looms, a

main pattern surface movable Vabout a xed axis, a set of fingers to cooperate therewith, an auxiliary pattern surface, connecting' rods operatively connected to the fingers andA having portions to be engaged by the auxiliary surface, means to render the main pattern surface operative, and means to raise the auxgagenientwith the portions of the rod adapted for engagement with said auxiliary pattern surface.

3 In a pattern mechanism for looms, `a main pattern surface movable about a fixed axis, a set of lingers to be controlled by the main pattern surface, rods extending upwardly from said fingers operatively related to the latter, an auxiliary pattern surfacel ttl)j have operative contact with .the upper ends or fthe Vrods at predetermined times, a supv iliary pattern surface out of operative enport for the auxiliary pattern surface having a portion to lie in the path of and to be movable by a part of the main pattern surface, 1

said part of the main pattern surface operating to effect movement of` the auxiliary" iliary pattern surface normally out of controlling position with respect to the opern Y ating. members,1a movable support for the auxillary pattern surface, and an element carried by the main pattern surface and ef- Y.

fective to move auxiliary surface into engagement with the members, whereby the auxiliary pattern surface will control the fingers.'l

5. In a pattern mechanism for looms, a main pattern surface movable about a fixed axis, a set of fingers to be operated by said main pattern surface, members operatively connected to and projecting upwardly from the fingers, an upper auxiliary pattern surface formed of a plurality of disks, said pattern surface being capable of assumingja plurality of different angular positions and to be operatively related to the members in each angular position, there being at least one disk to have operative engagement with one of the members for each of the aforesaid an- Y guiar positions of the auxiliary pattern surface, and means to renderl said pattern surfaces alternately elfective to control the fingers. 1 .Y

6. In a pattern mechanism for looms, a set of dobby fingers, a pair of pattern surfaces alternately effective to control the dobby fin-` gers, rods havingoset lower portions to be operatively related to certain ofthe iingers, said rods projecting upwardly from the fingers and having their upper ends bent back on themselves to have two substantially parallel spaced portions for each rod, and a guide to receive'the spaced portions of each rod to hold the same against substantial angular movement, that portion of the upper end of each rod intermediate the parallel one of the pattern surfaces.

7. In a pattern mechanism for looms, a

' jecting end, a rod having a portion received by'the recess below the corresponding hook Vand projecting upwardly, an auxiliary pattern mechanism to act directly on the upper end ofv the rod to control said hook, and a j main pattern mechanism for the fingers also effective to control they hooks.

8. In a patternfmechanismfor looms, a

pair of pattern surfaces, a set of dobby iingers, means to render said pattern surfaces alternately eEective to control the iingers, upwardly extending rods operatively con-- nected to the ngers and adapted -for cooperation with one of the pattern surfaces, `said rods having their upper ends bent Vback on themselves to provide rounded upper ends to have'direct engagement with one of the pattern surfaces, the bent back ends of alternate rods being spaced from the main'part of the rod a given distance, and the bent back ends of the intermediate rods being spaced a different distance from their correspending rods, and a guide to receive the upper ends of all the rods. y

9. In a pattern mechanism for looms, a set of dobby ngers, a pair of pattern surfaces to be alternately operative with respect to the fingers, rods projecting upwardly from the fingers, the upper ends 'of alternate rods being bent back on themselves to have a downwardly projecting end spaced a given distance from the main part of said alternate rods, the intermediate rods also having i their ends bent back, the downwardly projecting ends of said intermediate rods being at a greater distance from the rods than is the case with the alternate rod, and a, guide :75,5 having VVopenings for thereception of said rodsand their depending'ends.

10.7InV a pattern mechanism for'looms, a

main pattern surface movable about a fixed axis, a set of fingers to be operated by said j maln pattern surface, upwardly extending rods the lower ends of which are operatively connected to the fingers, the upper ends of said rods being bentback on themselves to have spaced substantially parallel portions,

'l a stationaryV guide to receive the-parallel portions of each rod and' hold the same engagement at selected times with the upper ends of the rods to depress the latter.

In testimony whereof I have hereunto afiixed my signature.

ALBERT A. GORDON.

' portions thereof to be engaged directly by 

